2-(2-imidazolin-2-yl)pyridines and quinolines, process and intermediates for the preparation thereof, and use of said compounds as herbicidal agents
This is a divisional application of Ser. No. 07/280,906 filed Dec. 9, 1988, now U.S. Pat. No. 4,923,504 which is a divisional of Ser. No. 850,192 filed Apr. 10, 1986 which is now U.S. Pat. No. 4,798,619 (1989), which is a division of Ser. No. 382,041 filed May 25, 1982 which is now U.S. Pat. No. 4,638,068 (1987), which is a continuation-in-part of Ser. No. 252,704 filed Apr. 8, 1981, now abandoned, which is a continuation-in-part of abandoned applications Ser. Nos. 155,909, 155,910, 155,867, 155,908 and 155,865 all filed Jun. 2, 1980. 
    
    
     SUMMARY OF THE INVENTION 
     The invention is intermediates and herbicidal compounds of the formulas: ##STR1## wherein R 1  is C 1  -C 4  alkyl; 
     R 2  is C 1  -C 4  alkyl or C 3  -C 6  cycloalkyl; and when R 1  and R 2  are taken together with the carbon to which they are attached they may represent C 3  -C 6  cycloalkyl optionally substituted with methyl; 
     X is hydrogen, halogen, hydroxyl or methyl, with the proviso that when Y and Z are taken together to form a ring and YZ is represented by the structure: --(CH 2 ) n  --, where n is 3 or 4, X is hydrogen; 
     Y and Z are each hydrogen, halogen, C 1  -C 6  alkyl, hydroxyloweralkyl, C 1  -C 6  alkoxy, C 1  -C 4  alkylthio, phenoxy, C 1  -C 4  haloalkyl, nitro, cyano, C 1  -C 4  alkylamino, diloweralkylamino or C 1  -C 4  alkylsulfonyl group, or phenyl optionally substituted with one C 1  -C 4  alkyl, C 1  -C 4  alkoxy or halogen; and, when taken together, Y and Z may form a ring in which YZ are represented by the structure: --(CH 2 ) n  --, where n is an integer of 3 or 4, provided that X is hydrogen; or ##STR2##  where L, M, Q and R 7  are each hydrogen, halogen, C 1  -C 4  alkyl, C 1  -C 4  alkoxy, C 1  -C 4  alkylthio, C 1  -C 4  alkylsulfonyl, C 1  -C 4  haloalkyl, NO 2 , CN, phenyl, phenoxy, amino, C 1  -C 4  alkylamino, diloweralkylamino, chlorophenyl, methylphenyl, or phenoxy substituted with one Cl, CF 3 , NO 2  or CH 3  group, with the proviso that only one of L, M, Q or R 7  may represent a substitutent other than hydrogen, halogen, C 1  -C 4  alkyl or C 1  -C 4  alkoxy. 
     INCORPORATION BY REFERENCE 
     The specification of U.S. Pat. No. 4,638,068 (1987) which was parent application U.S. Ser. No. 382,041, filed May 5, 1982 is hereby incorporated by reference.